Cited by 271Astro and Planetary SciencePlanetary Science and ExplorationHistory and Developments in Astronomy

The Late Heavy Bombardment

Bottke, William F., Norman, Marc D.·2017·Annual Review of Earth and Planetary Sciences

Abstract

Heavily cratered surfaces on the Moon, Mars, and Mercury show that the terrestrial planets were battered by an intense bombardment during their first billion years or more, but the timing, sources, and dynamical implications of these impacts are controversial. The Late Heavy Bombardment refers to impact events that occurred after stabilization of the planetary lithospheres such that they could be preserved as craters and basins. Lunar melt rocks and meteorite shock ages point toward a discrete episode of elevated impact flux between ∼3.5 and ∼4.0–4.2 Ga, and a relative quiescence between ∼4.0–4.2 and ∼4.4 Ga. Evidence from Precambrian impact spherule layers suggests that a long-lived tail of terrestrial impactors lasted to ∼2.0–2.5 Ga. Dynamical models that include populations residual from primary accretion and destabilized by giant planet migration can potentially account for the available observations, although all have pros and cons. The most parsimonious solution to match constraints is a hybrid model with discrete early, post-accretion and later, planetary instability–driven populations of impactors.

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Crossref · 10.1146/annurev-earth-063016-020131

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121 of 121 references verified0 citation errors · 0 not checkable

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Authors
Bottke, W. F., & Norman, M. D.
Affiliations
  • Southwest Research Institute (US)
  • Australian National University (AU)
Venue
Annual Review of Earth and Planetary Sciences
Published
2017-08-30
Volume
45
Issue
1
Pages
619-647
ISSN
  • 0084-6597 (ISSN-L)
  • 1545-4495
OpenAlex
W2519748279
Cited by
271
References
121
Citations by year
2026: 14 · 2025: 39 · 2024: 36 · 2023: 28 · 2022: 42 · 2021: 40 · 2020: 21 · 2019: 27 · 2018: 16 · 2017: 8
FWCI
1.98
Type
journal article
Language
en
Open access
closed
Locations
  • Annual Review of Earth and Planetary Sciences (publishedVersion)
  • ANU Open Research (Australian National University) (submittedVersion)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Planetary Science and Exploration
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › History and Developments in Astronomy
Keywords
Late Heavy Bombardment, impact history, impact craters, giant planet migration, impactor population, terrestrial planets, Moon, Mars, mercury, impact flux

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